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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c01a0440ae586c92c710f977b72d1241c822b2716fd382dc70f605bd8e3c97ba' 
  AND token = 'rrIjEsYW4ULSbCof8yXHXkTWv8BjbES0YYYso4oIhSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}